Grate for furnaces



(No Model.)

A. JAY.

GRATE FOR FURNACES.

No. 576,868; Patented Feb. 2,1897.

a .l/ V

UNITED STATES PATENT OFFICE.

AARON JAY, OF CHICAGO, ILLINOIS.

GRATE FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 576,368, dated February 2, 1897. Application filed March 19, 1896. Serial No. 584,012- (No model.)

To all 1071,0722, it may concern.-

Be it known that I, AARON JAY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Furnaces, of which the following is a full, clear, and exact description, such as will enable those skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

The invention relates to improvements in that class of furnaces in which fuel is fed into the combustion-chamber by machinery. It has for its object the provision of such a mechanism that will insure auniform movement of the fuel into the chamber and a proper clearance of the same of ashes.

The invention consists in the novel construction, combination, and arrangement of parts, such as will be hereinafter fully described, pointed out in the appended claims, and illustrated in the accompanying drawings.

In the accompanying drawings, in which similar letters of reference designate corresponding parts, Figure 1 is a longitudinal vertical sectional View of a furnace embodying the invention. Fig. 2 is ahorizontal section on the line 2 2 of Fig. 1. Fig. 3 is a detail view showing the horizontal and inclined grates and the connection between the same. Fig. 4. is a detail View showing the grate-moving eccentrics. Fig. 5 is a detail view showing the yoke which connects the horizontal grate-bar with the eccentric. Fig. 6 is a detail view showing the connecting ends of the horizontal and inclined grate-bars. Fig. 7 is a detail sectional view taken on the line 7 7 of Fig. 3.

Referring to the drawings byletter, A designates a return-flue boiler, but which may be of any construction suit-able in the premises, suitably supported above the furnace B. The latter'is connected at its rear end with the flues leading through the boiler by the passage 12. Leading fron the front of the boiler to the uptake is the passage h. Con

nected with the front end of the furnace is a hopper 5 provided with a door 11 through which fuel is introduced.

Transversely of the furnace, and beneath the lower edge of the incline b of the hopper, is mounted the rotatable shaft 0, journaled at its ends in suitable bearings in the walls B B. On the shaft 0 are secured the eccentrics c c in such a manner that they alternately project in opposite directions. (See Fig. 4.) Each of these eccentrics is provided with an annular ridge (2 on its periphery. On each of the eccentrics is mounted a yoke D. The bearing-surface of the latter is provided with a recess cl, in which the annular ridge 0 moves. In the opening of the yoke is seated the block d, which is secured in place by the set-screws (1 d The block is provided with ridges d 01 which register with the recesses 01 d in the ends of the yoke. It is also provided with a groove d which registers with the annular flange c of the eccentric. In a socket in the projection d of the yoke is sea-ted the forward end of the gratebar E, which is secured therein by the sets crew cl.

Transversely of the furnace, beneath the rear ends of the grate-bars E E, is mounted the beam F, with its ends seated in the walls B B. The upper face of the beam is provided with a series of ridges ff, one for each grate-bar, and directly beneath the rear end of the latter. On each of these ridges is mounted a friction-roller f, provided with an annular groove in its periphery, which registers with its respective ridge. On the roller is mounted the carriage f on which the rear end of the grate-bar E is supported. This carriage has an extension f projecting down from each end, which serves to retain the roller in place.

In the rear end of the grate-bar E is formed a socket c, in which is seated the ball-shaped end 'h of the inclined grate-bar H. The relative dimensions of the socket and ball are such as to allow a horizontal movement of the grate-bar E and also a vertical movement of the same at its forward end.

The inclined grate-bar H is pivoted at its lower end in the support 71., so that it can be moved slightly by the grate-bar E. It may, however, be immovably secured in any suitable manner.

A receptacle II is formed at the rear of the horizontal grate-bars E E by the inclined bars H H and k h and the horizontal bars .h 71.

The grate-bars 7L3 h are secured at their lower ends in the support 702 and at their upper ends to the wall h. Between the supports it and 7L2 are mounted the grate-bars 71, h In this receptacle is mounted the rotatable shaft I, which carries the stirrers i 2'.

In the bottom. of the ash-pit is mounted the screw-conveyer L. It leads from beneath the receptacle II to the front of the furnace and serves to carry the ashes that have been deposited by the grates to asuitable receptacle.

Suitable mechanism, such as is shown in patent No.522,215, granted to me July 3, 1894, can be used to drive the several rotatable shafts.

- The operation of the device is as follows: Fuel is introduced into the hopper b and by reason of the latters inclined bottom 19 is gradually fed upon the grate-bars E E. The shaft C having been set in motion through its eccentric connections with the grate-bars E E, the fuel. will be gradually moved to the rear of the furnace into the receptacle H. The movement of thehorizontal grate-bars is such that while one half of them are moving from an elevated position to the rear and downwardly the other half are moving from a depressed position forwardly and upwardly. By such an arrangement the fuel is practically carried by the grate-bars moving to the rear, as they are the highest. The knucklejoint connecting the horizontal grate -bars with the inclined ones and the carriages supporting the rear ends of the former allow this reciprocating and rocking movement.

While the fuel is passing along the horizontal grate-bars gases are generated bytheheat 1 of the furnace. These gases pass to the rear of the combustion-chamber and are thrown by the deflector K upon the incandescent fuel contained in the receptacle II. In this way a complete combustion is secured. The fuel contained within the receptacle is agitated by the movement of the inclined bars H H and the stirrers t t'.

Vhile the construction hereinbefore described is the preferred embodiment, yet it can be departed from to a considerable extent without departing from the spirit of the invention.

Having thus described my invention, what Iclaim, and desire to secure by Letters Patent, is-

1. In a furnace, a movable carriage, a gratebar sustained thereby at one end, a yoke attached to the other end of said grate-bar, an eccentric engaging with said yoke, a block seated in the open end of said yoke and bearing against said eccentric, and mechanism for rotating said eccentric.

2. Ina furnace, a movable carriage, ahori zontal grate-bar sustained at one end thereby, an inclined grate-bar pivoted at an end to a stationary part of the furnace and hinged at the other end to the end of the horizontal grate-bar supported by the carriage, and a mechanism connected with the free end of the horizontal grate-bar to move the same.

3. In a furnace, a movable carriage, ahorizontal grate-bar sustained at one end thereby, a mechanism connected with the other end of the said grate-bar to move the same horizont-ally, and an inclined grate-bar pivoted at one end and hinged at the other to the said horizontal grate-bar.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

AARON JAY.

Witnesses:

HENRY LAUTH, FRANK DUGGAN. 

